1 Use a cock ring. 2  A very easy way to keep an erection is to use a cock ring during sex. 3  A cock ring is an adjustable plastic band that fits over the base of the penis and behind the testicles. 4  A cock ring gives a man a rock hard erection, and desensitizes the penis so he can keep an erection longer.
A Master Chief Petty Officer is a Senior Noncommissioned Officer, with a military paygrade of E-9. The civilian equivalent of this military rank is roughly GS-6 under the federal government's General Schedule payscale.
In today's Air Force, the term sergeant refers to all Air Force non-commissioned officers up to senior master sergeant (E-8). An airman who has achieved the rank of chief master sergeant (E-9) is referred to as Chief. Those in the grade of staff sergeant (E-5) and technical sergeant (E-6) are referred to as non-commissioned officers, while those in the grade of master sergeant (E-7) through chief master sergeant (E-9) are referred to as senior non-commissioned officers.